// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
//
// Copied from
// https://github.com/awslabs/aws-glue-data-catalog-client-for-apache-hive-metastore/blob/branch-3.4.0/
//

package com.amazonaws.glue.catalog.util;

import java.util.Collection;

public class LoggingHelper {

  private static final int MAX_LOG_STRING_LEN = 2000;

  private LoggingHelper() {
  }

  public static String concatCollectionToStringForLogging(Collection<String> collection, String delimiter) {
    if (collection == null) {
      return "";
    }
    if (delimiter == null) {
      delimiter = ",";
    }
    StringBuilder bldr = new StringBuilder();
    int totalLen = 0;
    int delimiterSize = delimiter.length();
    for (String str : collection) {
      if (totalLen > MAX_LOG_STRING_LEN) break;
      if (str.length() + totalLen > MAX_LOG_STRING_LEN) {
        bldr.append(str.subSequence(0, (MAX_LOG_STRING_LEN-totalLen)));
        break;
      } else {
        bldr.append(str);
        bldr.append(delimiter);
        totalLen += str.length() + delimiterSize;
      }
    }
    return bldr.toString();
  }

}
